Historically distinct IANA time zone
Europe/Sofia
- Countries
- Bulgaria
- GPS reference
- 42.68° N, 23.32° E
- Data source
- IANA europe
- Aliases
- None
BulgariaGeographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 42.68° N, 23.32° E. Associated countries: BG.
The Wikipedia link provides additional context; it is not evidence for a historical claim. Transition data comes from the IANA source file.
Notes from the time database
The story behind the clock
These source notes describe a period or rule. They do not, by themselves, establish a causal claim for a particular clock change.
Older C-Eur rules are for convenience in the tables. From 1977 on, C-Eur differs from EU only in that C-Eur uses standard time.
Bulgaria The tzdata source notes: EET -> EETDST is in 03:00 Local time in last Sunday of March ... EETDST -> EET is in 04:00 Local time in last Sunday of October
E-Eur differs from EU only in that E-Eur switches at midnight local time.
The following rules are for the European Union and for its predecessor organization, the European Communities. For brevity they are called "EU rules" elsewhere in this file.
Original IANA source file: europe.
A shared present
Same clock today, different past
These nearby zones follow the same current annual pattern, yet retain their own historical record.
Romania · 297 km from the reference location · Same annual clock since 1994
Greece · 526 km from the reference location · Same annual clock since 1997
Moldova · 647 km from the reference location · Same annual clock since 2022Civil-time record
Recorded changes over time
From 1880 to 2027 · 106 recorded transitions
Recurring daylight-saving changes are grouped separately when JavaScript is available.
Notable changes
One-off changes and transitions outside the recurring seasonal rhythm.
- +01:56 · IMTStandard time applies
- +02:00 · EETStandard time applies
- +01:00 · CETStandard time applies
- +02:00 · CESTDaylight saving time begins
- +01:00 · CETStandard time applies
- +02:00 · CESTDaylight saving time begins
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1880-01-01 00:23 | +01:56 | IMT | Standard time |
| 1894-11-30 00:03 | +02:00 | EET | Standard time |
| 1942-11-02 02:00 | +01:00 | CET | Standard time |
| 1943-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 1943-10-04 02:00 | +01:00 | CET | Standard time |
| 1944-04-03 03:00 | +02:00 | CEST | Daylight saving time |
| 1944-10-02 02:00 | +01:00 | CET | Standard time |
| 1945-04-02 04:00 | +02:00 | EET | Standard time |
| 1979-04-01 00:00 | +03:00 | EEST | Daylight saving time |
| 1979-10-01 00:00 | +02:00 | EET | Standard time |
| 1980-04-06 00:00 | +03:00 | EEST | Daylight saving time |
| 1980-09-29 00:00 | +02:00 | EET | Standard time |
| 1981-04-05 00:00 | +03:00 | EEST | Daylight saving time |
| 1981-09-27 01:00 | +02:00 | EET | Standard time |
| 1982-04-04 00:00 | +03:00 | EEST | Daylight saving time |
| 1982-09-26 02:00 | +02:00 | EET | Standard time |
| 1983-03-27 03:00 | +03:00 | EEST | Daylight saving time |
| 1983-09-25 02:00 | +02:00 | EET | Standard time |
| 1984-03-25 03:00 | +03:00 | EEST | Daylight saving time |
| 1984-09-30 02:00 | +02:00 | EET | Standard time |
| 1985-03-31 03:00 | +03:00 | EEST | Daylight saving time |
| 1985-09-29 02:00 | +02:00 | EET | Standard time |
| 1986-03-30 03:00 | +03:00 | EEST | Daylight saving time |
| 1986-09-28 02:00 | +02:00 | EET | Standard time |
| 1987-03-29 03:00 | +03:00 | EEST | Daylight saving time |
| 1987-09-27 02:00 | +02:00 | EET | Standard time |
| 1988-03-27 03:00 | +03:00 | EEST | Daylight saving time |
| 1988-09-25 02:00 | +02:00 | EET | Standard time |
| 1989-03-26 03:00 | +03:00 | EEST | Daylight saving time |
| 1989-09-24 02:00 | +02:00 | EET | Standard time |
| 1990-03-25 03:00 | +03:00 | EEST | Daylight saving time |
| 1990-09-30 02:00 | +02:00 | EET | Standard time |
| 1991-03-31 01:00 | +03:00 | EEST | Daylight saving time |
| 1991-09-28 23:00 | +02:00 | EET | Standard time |
| 1992-03-29 01:00 | +03:00 | EEST | Daylight saving time |
| 1992-09-26 23:00 | +02:00 | EET | Standard time |
| 1993-03-28 01:00 | +03:00 | EEST | Daylight saving time |
| 1993-09-25 23:00 | +02:00 | EET | Standard time |
| 1994-03-27 01:00 | +03:00 | EEST | Daylight saving time |
| 1994-09-24 23:00 | +02:00 | EET | Standard time |
| 1995-03-26 01:00 | +03:00 | EEST | Daylight saving time |
| 1995-09-23 23:00 | +02:00 | EET | Standard time |
| 1996-03-31 01:00 | +03:00 | EEST | Daylight saving time |
| 1996-10-26 23:00 | +02:00 | EET | Standard time |
| 1997-03-30 04:00 | +03:00 | EEST | Daylight saving time |
| 1997-10-26 03:00 | +02:00 | EET | Standard time |
| 1998-03-29 04:00 | +03:00 | EEST | Daylight saving time |
| 1998-10-25 03:00 | +02:00 | EET | Standard time |
| 1999-03-28 04:00 | +03:00 | EEST | Daylight saving time |
| 1999-10-31 03:00 | +02:00 | EET | Standard time |
| 2000-03-26 04:00 | +03:00 | EEST | Daylight saving time |
| 2000-10-29 03:00 | +02:00 | EET | Standard time |
| 2001-03-25 04:00 | +03:00 | EEST | Daylight saving time |
| 2001-10-28 03:00 | +02:00 | EET | Standard time |
| 2002-03-31 04:00 | +03:00 | EEST | Daylight saving time |
| 2002-10-27 03:00 | +02:00 | EET | Standard time |
| 2003-03-30 04:00 | +03:00 | EEST | Daylight saving time |
| 2003-10-26 03:00 | +02:00 | EET | Standard time |
| 2004-03-28 04:00 | +03:00 | EEST | Daylight saving time |
| 2004-10-31 03:00 | +02:00 | EET | Standard time |
| 2005-03-27 04:00 | +03:00 | EEST | Daylight saving time |
| 2005-10-30 03:00 | +02:00 | EET | Standard time |
| 2006-03-26 04:00 | +03:00 | EEST | Daylight saving time |
| 2006-10-29 03:00 | +02:00 | EET | Standard time |
| 2007-03-25 04:00 | +03:00 | EEST | Daylight saving time |
| 2007-10-28 03:00 | +02:00 | EET | Standard time |
| 2008-03-30 04:00 | +03:00 | EEST | Daylight saving time |
| 2008-10-26 03:00 | +02:00 | EET | Standard time |
| 2009-03-29 04:00 | +03:00 | EEST | Daylight saving time |
| 2009-10-25 03:00 | +02:00 | EET | Standard time |
| 2010-03-28 04:00 | +03:00 | EEST | Daylight saving time |
| 2010-10-31 03:00 | +02:00 | EET | Standard time |
| 2011-03-27 04:00 | +03:00 | EEST | Daylight saving time |
| 2011-10-30 03:00 | +02:00 | EET | Standard time |
| 2012-03-25 04:00 | +03:00 | EEST | Daylight saving time |
| 2012-10-28 03:00 | +02:00 | EET | Standard time |
| 2013-03-31 04:00 | +03:00 | EEST | Daylight saving time |
| 2013-10-27 03:00 | +02:00 | EET | Standard time |
| 2014-03-30 04:00 | +03:00 | EEST | Daylight saving time |
| 2014-10-26 03:00 | +02:00 | EET | Standard time |
| 2015-03-29 04:00 | +03:00 | EEST | Daylight saving time |
| 2015-10-25 03:00 | +02:00 | EET | Standard time |
| 2016-03-27 04:00 | +03:00 | EEST | Daylight saving time |
| 2016-10-30 03:00 | +02:00 | EET | Standard time |
| 2017-03-26 04:00 | +03:00 | EEST | Daylight saving time |
| 2017-10-29 03:00 | +02:00 | EET | Standard time |
| 2018-03-25 04:00 | +03:00 | EEST | Daylight saving time |
| 2018-10-28 03:00 | +02:00 | EET | Standard time |
| 2019-03-31 04:00 | +03:00 | EEST | Daylight saving time |
| 2019-10-27 03:00 | +02:00 | EET | Standard time |
| 2020-03-29 04:00 | +03:00 | EEST | Daylight saving time |
| 2020-10-25 03:00 | +02:00 | EET | Standard time |
| 2021-03-28 04:00 | +03:00 | EEST | Daylight saving time |
| 2021-10-31 03:00 | +02:00 | EET | Standard time |
| 2022-03-27 04:00 | +03:00 | EEST | Daylight saving time |
| 2022-10-30 03:00 | +02:00 | EET | Standard time |
| 2023-03-26 04:00 | +03:00 | EEST | Daylight saving time |
| 2023-10-29 03:00 | +02:00 | EET | Standard time |
| 2024-03-31 04:00 | +03:00 | EEST | Daylight saving time |
| 2024-10-27 03:00 | +02:00 | EET | Standard time |
| 2025-03-30 04:00 | +03:00 | EEST | Daylight saving time |
| 2025-10-26 03:00 | +02:00 | EET | Standard time |
| 2026-03-29 04:00 | +03:00 | EEST | Daylight saving time |
| 2026-10-25 03:00 | +02:00 | EET | Standard time |
| 2027-03-28 04:00 | +03:00 | EEST | Daylight saving time |
| 2027-10-31 03:00 | +02:00 | EET | Standard time |